Servocontrolled radiant warmers are widely used for infants' temperature maintenance. Covering the attached skin temperature (or thermistor) probe with a reflective shield may prevent inadvertent warming of the probe by the radiant heat source. However the shield itself might cause falsely elevated or lowered measured skin temperatures, and the use of such shields, while widespread, is not universal nor standard of care. This study aims to document the effects of a reflective shield on the measured skin temperatures of neonates nursed under radiant warmers.